Question

what type of microscope would you use if you wanted to examine the ridges on the outside of a larval mollusk shell? light microscope transmission electron microscope scanning electron microscope transmission or scanning electron microscopes light microscope or transmission electron microscope

Explanation:

Light microscopes can visualize larger surface structures like the ridges on a larval mollusk shell with sufficient magnification (typically up to ~1000x) without needing sample preparation required for electron microscopes. Transmission electron microscopes are used for internal thin-sectioned samples, not surface structures. Scanning electron microscopes offer higher resolution for surfaces but are unnecessary here as light microscopes can resolve these ridges.

Answer:

light microscope